الفهرس 
Magdy Rezk Samak
ABSTRACTOnly 14 pages are availabe for public view
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Abstract
The experimental study was carried out to assess the environmental impact of
wastewater from industrial activities on some soil’s physical, chemical properties and to
study risk assessment of using irrigation water mixed with industrial wastewater on soil
and plants. El-Roby village’s agricultural soils were chosen for this purpose because
they are irrigated by the Bahr Wahba canal, which is adjacent to the Kom Oshim
industrial zone. Thirteen water samples were collected from the study sites (one from
each), plus one wastewater sample and one water sample from the Nile for comparison.
Pre-cleaned high-density polyethylene bottles were used for the sample. Soil samples
were collected from farms irrigated by wastewater from the canal that runs through the
study area. Two representative soil samples were collected from soil profiles at potential
root zone depth for each farm (0 – 30 cm, 30 – 60 cm).
The results revealed that the lowest pH value was found in industrial wastewater, this
means that the use of this irrigation water should be done with caution. The highest EC
dS m-1 value of the industrial wastewater cations and anions distribution was the
descending order as following:-Na+<Ca2+<Mg2+<K+
and Cl−<SO4
=<HCO3
−<CO3
=
. All
soluble ions were found at permissible limit except soluble N was excessive levels,
boron content at toxic levels. Some micro-nutrient deficiency problems and not
contamination by heavy metals, i.e, Industrial water is not valid for irrigation as well as
mixed water not suitable for irrigation. The average ESP in all sites was 20.20. Higher
concentration of soil OM% in clay soil was found in appreciably 2.23-1.62% than OM
content in sandy loam soils 0.94-0.24%. CaCO3 content varied from 10.20-5.20 and 6.6-
5.00% while those of CEC ranged from 15.02-10.24 and 40.25 - 30.25 cmolc kg-1
for
sandy loam and clay soils, respectively. Data also clarified the correlation coefficients
which were highly significant between physical, chemical properties, total, available
macro, micro and heavy metals content of soil under study. The contamination factors
(CF) were low with Mn, Zn and Cr at all investigated sites and contamination degree
(Cd) was ultra-high in all sites excepted one site was extremely high. The Enrichment
factors (EF) of the heavy metals were more than 1.0 for most of the metals, expect Mn
and Cr at all sites under study except one site for Zn from total sites under study.
The bio concentration factor (BCF); for each plant has a specific capability to
accumulate elements in their tissue. For example summer season all plants were hyperaccumulator for Fe, Mn, Zn, and Cu in all sites except Zn and Cu in carrot shoot.